Injection-syringe with protecting-hood



G. T.- COURT.

INJECTION SYRINGE WITH PROTECTING HOOD.

APPLICATION FILED JULY 8.1919.

1 ,336,730 7 Patented Apr. 13, 1920.

GEORGES THEODORE COURT, OF BASEL, SW

LA ROCHE CHEMICAL WORKS, OF NEW Y ITZERLAND. ASSIGNOR TO THE HOFFMANN- ORK, N. Y., A CORPORATION OF NEW YORK.

IN J ECTION-SYRIN GE WITH PROTECTING-HOOD.

Specification of Letters Patent.

Patent ed 'A pr. 13, 1920.

Application filed July 8. 1919. Serial No. 309,520.

'1 b all whom it may concern Be it known that- I, (inouons THnononn Couu'r, a citizen of Switzerland, and a resident of Basel, Switzerland, have invented certain new and useful Improvements in Injection-Syringes with Protecting-Hoods, of which the following is a specification.

The method of introducing medicines into the human body by injection stands in ever increasing favor with the medical profession and in consequence thereof there has sprung up the need for an instrument at any time ready for use and allowing perfectly sterile injection instead of the ordinary hypodermic syringe, which required careful and tedious cleansing and sterilizing before being used. The combination of a compressible tube, serving as reservoir for the liquid, with a hollow injection needle constitutes, in principle, such an instrument. The problem to be solved for the further perfection of this instrument was to find suitable means for warranting absolute sterility of. the liquid as well as of all parts coming into contact with the field of injection. Vith this idea in view the injection needle was protected by a hood and the liquid isolated by means of an indifferent neutral mass or by a lid of metal. A safe and durable fixing of the protecting hood is of great importance for absolute sterility. If the protecting hood is not very securely fixed it will loosen on being transported from one place to another and then the injection needle will no longer be per fectly sterile.

The object of the present invention is a new method for the safe and durable fixing of the protecting hood to the upper end of the reservoir which forms a sort of nozzle and shall be called by this name in the following. For this purpose a ferrule is fastened around the lower end of the protecting hood; it consists of a flexible material, for instance a soft metal, and is partly pressed into the grooves of the nozzle. \Vhen using the syringe, the ferrule is unrolled and then the protecting hood can be moved. The ferrule may consist of a strip of metal, for instance tin, which is opened by unrolling, or of an endless band for instance of aluminium which is removed from the head of the tube by cutting through. The protecting hood may preferably consist of glass.

One example of the invention is illustrated in the attached drawings. Figure l represents a side view of the instrument, Fig. 2

a vertical cut. 7) designates the tube containing the liquid, /a that part which has been described as nozzle, m the lid of metal, which, immediately before use, is pierced by means of the stylet s, passing through the injection needle 91. r designates the grooves on the bottom of the nozzle. The protecting tube 5 is kept in place by means of a strip of metal consisting for instance of tin and wrapped three times around it ('w 'w 11: set into the grooves 1*.

To use the instrument one proceeds as follows: a

By unrolling or cutting through the strip of metal the protecting hood can be moved. The latter is then pressed a ainst the nozzle and the stylet perfol'ates tie lid of metal. The protecting hood and stylet are pulled off and the syringe is ready for use. The

contents of the reservoir are carried to the point of the needle by compressing the tube.

I claim:

1. An injection syringe comprising a reservoir, ahollow injection needle fitted thereon. means whereby communication between said reservoir and needle is cut ofl, a protecting hood normally covering the needle, a stylet carried by said hood and extending through said needle and arranged to be actuated by said hood to pierce said means whereby communication between said reservoir and needle is established and a removable convolute fastening band extending about said hood whereby the latter is fixed in operative position.

2. An injection syringe comprising a reservoir, a nozzle fitted thereon and provided with a recess. a hollow injection needle car ried by said nozzle, means whereby communication between said nozzle and reservoir is cut off, a protecting hood normally covering the needle, a stylet carried by said hood and extending through said needle and arranged to be actuated by said hood to pierce said means whereby communication between said nozzle and reservoir is established, and a removable fastening device extending about said hood and projecting into said recess whereby said hood is fixed upon said nozzle.

An injection syringe comprising a reservoir. a nozzle fitted thereon and provided with an annular groove, a hollow injection needle carried by said nozzle, means whereby communication between said nozzle and re srality of convolutions and projecting into 10 ervoir 1s cut off, a protecting hood normally said annular groove whereby said hood is covering the needle, a stylet carried by said fixed upon said nozzle.

'hood and extending through said needle and In witness whereof I have hereunto set arranged to be actuated by said hood to my hand.

pierce said means whereby communication GEORGES THEODORE COURT.

between said nozzle and reservoir is estab- Witnesses: lished and a removable band of flexible soft ALB. A. HOFFMAN,

material extending about said hood in a plu- HEINRICH HUBLI. 

